death clock (plural death clocks)
- A metaphorical clock representing when one is expected to die, e.g. when someone expects to have a short lifespan because of an illness.
- 2012, Michel Bruneau, The Emancipating Death of a Boring Engineer
- Keene had a death clock running, counting the days before his final breath, and his work plan was set to meet that last deadline, with a typical project management rigor.
- (humorous) Any of various websites that attempt to calculate when a person will die, based on calculations from their personal information (date of birth, whether they smoke, etc.).